JPS61208410A - Method of burner combustion with low nox - Google Patents

Method of burner combustion with low nox

Info

Publication number
JPS61208410A
JPS61208410A JP4980585A JP4980585A JPS61208410A JP S61208410 A JPS61208410 A JP S61208410A JP 4980585 A JP4980585 A JP 4980585A JP 4980585 A JP4980585 A JP 4980585A JP S61208410 A JPS61208410 A JP S61208410A
Authority
JP
Japan
Prior art keywords
combustion air
burner
air inlet
combustion
steam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4980585A
Other languages
Japanese (ja)
Inventor
Noboru Maki
真木 昇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rozai Kogyo Kaisha Ltd
Original Assignee
Rozai Kogyo Kaisha Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rozai Kogyo Kaisha Ltd filed Critical Rozai Kogyo Kaisha Ltd
Priority to JP4980585A priority Critical patent/JPS61208410A/en
Publication of JPS61208410A publication Critical patent/JPS61208410A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To save the consumed fuel and make it possible to carry out low NOx combustion for a burner by dividing the combustion air heated by the exhaust gas into two parts and leading one part to at least one of combustion air inlets that are provided at three points in a burner and leading the other part as steam-containing air to the combustion air inlets. CONSTITUTION:The piping on the discharge side of a blower 4 is branched, one being connected directly to a burner A and the other to the burner A through a spray tower 5. In the burner A a primary air inlet 7, a secondary air inlet 8 and tertiary combustion air inlet 9 are formed, and one of the branched pipings is further branched via a damper, and again the branched pipings are connected to the primary combustion air inlet 7 and the air inlet 8 of the secondary combustion air inlet 8 of the burner A via dampers. The other piping is connected to the spray tower 5. The heated combustion air becomes steam-containing air by passing through the spray tower 5, and it is connected to a tertiary combustion air inlet 9 of the burner A. The combustion temperature is lowered by the evaporation heat of the steam and NOx development is suppressed.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は゛、バーナーの低NOx燃焼方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a low NOx combustion method in a burner.

(従来の技術) 一般に燃焼によって生成するNO宜(窒素酸化物)の大
部分は一酸化窒素(NO)であり、燃料が高温で燃焼す
るとき、燃焼用空気中のN2と02が反応して生成し、
燃焼温度や0zIi1度が高いほどNOの生成は増大す
る。ところで、従来のバーナーにおいては、省エネルギ
ー化を考慮して排ガスによる熱交換により、昇温した空
気をそのまま燃焼突気としてバーナーに送入していた。
(Prior art) Generally, most of the NO (nitrogen oxides) produced by combustion is nitrogen monoxide (NO), and when fuel is burned at high temperature, N2 and NO2 in the combustion air react. generate,
The higher the combustion temperature and 0zIi1 degree, the more NO is produced. By the way, in conventional burners, in consideration of energy saving, air heated up by heat exchange with exhaust gas is directly fed into the burner as a combustion blast.

このこと、は熱エネルギーの有効利用によるバーナー消
費燃料の節減化にはなる。しかし、バーナー内において
は、燃焼時に燃焼温度が高温となり、NOxの発生量が
多くなるといった問題があった。
This results in a reduction in burner fuel consumption due to the effective use of thermal energy. However, within the burner, there is a problem that the combustion temperature becomes high during combustion, and the amount of NOx generated increases.

(発明が解決しようとする問題点) そこで本発明は、上記問題点に鑑みて開発された方法で
あり、その目的とする処は、熱エネルギーを有効・に利
用して消費燃料の節減化が図れると共に、バーナーの低
NOx燃焼を可能とした方法を提供することにある。
(Problems to be Solved by the Invention) The present invention is a method developed in view of the above problems, and its purpose is to reduce fuel consumption by effectively utilizing thermal energy. It is an object of the present invention to provide a method that enables low NOx combustion in a burner.

(問題点を解決するための手段) そして本発明は、上記目的を有効に達するために次のよ
うな手段としである。すなわち、熱交換器を介して排ガ
スにより、供給される燃焼空気を昇温し、この昇温燃焼
空気の流れを二分割にする。
(Means for Solving the Problems) In order to effectively achieve the above object, the present invention has the following means. That is, the combustion air supplied is heated by exhaust gas through a heat exchanger, and the flow of the heated combustion air is divided into two.

そして一方に分割した昇温燃焼空気を、バーナーの3ケ
所に設けこ燃焼空気入口の少なくともlケ所に導くよう
にし、他方の分割した昇温燃焼空気に水を噴霧して蒸気
含有空気とし、この蒸気含有空気を上記バーナーの3ケ
所に設けた燃焼空気入口の内、上記昇温燃焼空気を導い
た燃焼空気入口以外の他の燃焼空気入口に導くようにし
である。
Then, the heated combustion air divided into one part is provided at three locations in the burner and guided to at least one combustion air inlet, and the other divided heated combustion air is sprayed with water to become steam-containing air. Of the three combustion air inlets provided in the burner, the steam-containing air is guided to another combustion air inlet other than the combustion air inlet through which the heated combustion air was introduced.

また、上記分割した一方の昇温燃焼空気を、水スプレー
塔内を通過させることによって蒸気含有空気とする。
In addition, one of the divided heated combustion air is made into steam-containing air by passing through a water spray tower.

(作 用) 供給される燃焼空気を熱交換器内を通過させると共に、
排ガスをこの熱交換器に導いて、上記燃焼空気を排ガス
との熱交換によって昇温させる。
(Function) As well as passing the supplied combustion air through the heat exchanger,
The exhaust gas is introduced into this heat exchanger, and the combustion air is heated by heat exchange with the exhaust gas.

そして、この昇温させた燃焼空気(以下、昇温燃焼空気
という。)の流れを、途中で流路を分岐することによっ
て二分割にし、分割した夫々の燃焼空気を、バーナーの
夫々の所定位置に導く。すなわち、二分割した流れの一
方の昇温燃焼空気を、バーナーの3ケ所に設けた燃焼空
気入口の少なくとも/ケ所に導くと共に、もう一方の昇
温燃焼空気を途中で水を噴霧して蒸気含有空気とし、こ
の空気を上記バーナーの3ケ所に設けた燃焼空気入口の
内、上記昇温燃焼空気を導いた燃焼空気入口以外の他の
燃焼空気入口に導くようにする。このことにより、バー
ナーの燃焼時に燃焼ガス温度が蒸気含有空気の気化熱に
よって降温され、また蒸気含有空気の含有酸素は、燃料
燃焼酸素となるため、燃焼空気量を消滅することができ
る。そのため燃焼ガス内の窒素量も減少し、バーナー燃
焼における低NOx化を図ることができる。
Then, the flow of this heated combustion air (hereinafter referred to as heated combustion air) is divided into two by branching the flow path midway, and each divided combustion air is distributed to each predetermined position of the burner. lead to. That is, one of the heated combustion air of the divided flow is guided to at least one of the three combustion air inlets of the burner, and the other heated combustion air is sprayed with water in the middle to contain steam. This air is introduced into the combustion air inlet provided at three locations in the burner other than the combustion air inlet through which the heated combustion air is introduced. As a result, the combustion gas temperature is lowered by the heat of vaporization of the steam-containing air during combustion in the burner, and the oxygen contained in the steam-containing air becomes fuel combustion oxygen, so that the amount of combustion air can be eliminated. Therefore, the amount of nitrogen in the combustion gas is also reduced, making it possible to reduce NOx during burner combustion.

(実 施 例) 以°下、本発明の実施例を図に基づいて説明する。(Example) Hereinafter, embodiments of the present invention will be described based on the drawings.

実施例1 第1図は本発明に係る第7実施例を示し、(1)は熱交
換器、(2)はこの熱交換器(1)に高温排ガスを導く
ための配管、(3)は熱交換器(1)に燃焼用の空気を
導くための配管である。また、(4)は送風機であって
、上記燃焼用の空気を熱交換器(1)を介して吸引。
Embodiment 1 FIG. 1 shows a seventh embodiment of the present invention, in which (1) is a heat exchanger, (2) is a pipe for guiding high-temperature exhaust gas to the heat exchanger (1), and (3) is a heat exchanger. This is a pipe for guiding combustion air to the heat exchanger (1). Further, (4) is a blower which sucks the combustion air through the heat exchanger (1).

吐出するために熱交換器(1)に接続されたものである
。そして送風機(4)の吐出側配管は、途中で二つに分
岐してあり、一方は直接バーナー(2)に、他方はスプ
レー塔(5)を介してバーナー(勾に接続しである。具
体的には、バーナー(八には1次燃焼空気入口(7)、
2次燃焼空気入口(8)及び3次燃焼空気入口(9)が
形成されていて、上記二つに分岐された配管の一方は、
ダンパーな介して再に二つに分岐され、その内の一方の
配管は再びダンパーを介してバーナー(Nの一次燃焼空
気入口(7)に接続しである。またもう一方の配管は、
ダンパーを介して2次燃焼空気入口(8)に接続しであ
る。
It is connected to a heat exchanger (1) for discharge. The discharge side piping of the blower (4) is branched into two parts in the middle, one is directly connected to the burner (2) and the other is connected to the burner (gradient) via the spray tower (5). Specifically, the burner (8 is the primary combustion air inlet (7),
A secondary combustion air inlet (8) and a tertiary combustion air inlet (9) are formed, and one of the two branched pipes is
The pipe is once again branched into two through the damper, and one of the pipes is connected to the primary combustion air inlet (7) of the burner (N) through the damper.
It is connected to the secondary combustion air inlet (8) via a damper.

更に、前記送風機(4)の吐出側で分岐された他方の配
管は、昇温燃焼空気に水分を噴霧するために設けられた
スプレー塔(5)に接続しである。昇温燃焼空気がこの
スプレー塔(5)を通過することにより、蒸気含有空気
となる。(6)はスプレーノズルである。
Further, the other pipe branched on the discharge side of the blower (4) is connected to a spray tower (5) provided for spraying moisture to the heated combustion air. The heated combustion air passes through this spray tower (5) and becomes steam-containing air. (6) is a spray nozzle.

そしてこのスプレー塔(5)の出口側配管は、バーナー
(3)の3次燃焼空気入口(9)に接続しである。この
ようにして、昇温燃焼空気は、1次燃焼空気入口(7)
及び2次燃焼空気入口(8)に導かれ、蒸気含有空気は
、3次燃焼空気入口(9)に導かれるようにしである。
The outlet side piping of this spray tower (5) is connected to the tertiary combustion air inlet (9) of the burner (3). In this way, the heated combustion air is transferred to the primary combustion air inlet (7).
and a secondary combustion air inlet (8), and steam-laden air is directed to a tertiary combustion air inlet (9).

そしてこの実施例では、バーナー(勾での燃料は、バー
ナー(局の1次燃焼空気入口(7)に導かれた昇温燃焼
空気により充分混合させると共に、2次燃焼空気入口(
8)に導かれた昇温燃焼空気によって、1次燃焼するこ
とになる。この時、NOxの発生を抑えるために、低酸
素燃焼によって完全燃焼をさせず、燃焼温度を下げて3
次燃焼空気入口(9)から送入されてくる蒸気含有空気
を昇温し、空気中の酸素及び蒸気中の酸素が補給されて
2次燃焼し、完全燃焼する。
In this embodiment, the fuel at the burner is sufficiently mixed by heated combustion air introduced into the primary combustion air inlet (7) of the burner, and the fuel at the secondary combustion air inlet (7) is mixed sufficiently.
The heated combustion air introduced into step 8) causes primary combustion. At this time, in order to suppress the generation of NOx, low oxygen combustion is used to prevent complete combustion and the combustion temperature is lowered.
The steam-containing air introduced from the secondary combustion air inlet (9) is heated, and oxygen in the air and oxygen in the steam are replenished to cause secondary combustion and complete combustion.

この時、蒸気の気化熱で燃焼温度は下げられ、また蒸気
含有空気内の窒素含有fiは空気のみの場合よりも少な
いことと相俟って、NOxの発生を抑止し、低NOx燃
焼することができる。
At this time, the combustion temperature is lowered by the heat of vaporization of the steam, and together with the fact that the nitrogen content in the steam-containing air is lower than in the case of air alone, the generation of NOx is suppressed, resulting in low NOx combustion. I can do it.

実施例3 第2図は本発明に係る第2実施例を示し、送風機(4)
の吐出側の分岐した配管の内、一方の配管はバーナー(
局の1次燃焼空気入口(8)に接続され、昇温燃焼空気
を1次燃焼空気入口(8)に導くようにしである。また
他方の配管はスプレー塔(5)に接続され、スプレー塔
(5)の出口側配管は、途中で分岐され、一方はバーナ
ーに)の一次燃焼空気入口(8)に、他方は3次燃焼空
気入口(9)に接続しである。そしてスプレー塔(5)
による蒸気含有空気を一次燃焼空気入口(8)及び3次
燃焼空気入口(9)に導くようkしである。他の構成は
第1実施例と同様である。
Embodiment 3 FIG. 2 shows a second embodiment of the present invention, in which a blower (4)
Of the branched pipes on the discharge side, one pipe is connected to the burner (
The primary combustion air inlet (8) of the station is connected to the primary combustion air inlet (8) to direct heated combustion air to the primary combustion air inlet (8). The other pipe is connected to the spray tower (5), and the outlet pipe of the spray tower (5) is branched in the middle, one to the primary combustion air inlet (8) (to the burner), and the other to the tertiary combustion air inlet (8). It is connected to the air inlet (9). and spray tower (5)
The steam-containing air is directed to the primary combustion air inlet (8) and the tertiary combustion air inlet (9). The other configurations are the same as in the first embodiment.

この第2実施例では、バーナー(6)での燃料は、1次
燃焼空気入口(7)からの昇温燃焼空気と混合さn、2
次燃焼空気入口(8)からの蒸気含有空気と共に1次燃
焼とする。この時、蒸気含有空気内蒸気の気化熱により
、燃焼温度は下げられ、NOxの発生は抑えられる。そ
して、3次燃焼空気入口(旬よリバーナ−(N内に送入
された蒸気含有空気と混合して蒸気含有空気内酸素によ
り2次燃焼し、完全燃焼する。このように、蒸気の気化
熱により燃焼温度は下げられ、NOxの発生は抑止され
ると共に、2次及び3次の蒸気含有空気内窒素の含有量
の少なざと相俟って、低NOx燃焼をすることができる
In this second embodiment, the fuel at the burner (6) is mixed with heated combustion air from the primary combustion air inlet (7).
The primary combustion is carried out together with the steam-containing air from the secondary combustion air inlet (8). At this time, the combustion temperature is lowered by the heat of vaporization of the steam in the steam-containing air, and the generation of NOx is suppressed. Then, it is mixed with the steam-containing air sent into the tertiary combustion air inlet (Junyo Riverner), and secondary combustion occurs due to the oxygen in the steam-containing air, resulting in complete combustion. As a result, the combustion temperature is lowered, the generation of NOx is suppressed, and together with the small content of nitrogen in the secondary and tertiary steam-containing air, low NOx combustion can be achieved.

実施例8 第3図は本発明に係る第3実施例を示し、熱交換器(1
)に接続された配管は途中で分岐し、一方はダンパーを
介して送風機(4)に、他はダンパーを介してスプレー
塔(5)に接続しである。そして、送風機(4)の吐出
側に接続した配管は、途中で分岐し、一方はダンパーを
介してバーナー(勾の1次燃焼空気入口(72K 、他
方はダンパーを介して一次燃焼空気入口(8)に接続し
である。また、スプレー塔(5)の出口側配管は、送風
機(ト)を介してバーナー囚の3次燃焼空気入口(9)
に接続しである。他の構成は第1実施例と同様である。
Embodiment 8 FIG. 3 shows a third embodiment of the present invention, in which a heat exchanger (1
) is branched in the middle, one is connected to the blower (4) via a damper, and the other is connected to the spray tower (5) via a damper. The pipe connected to the discharge side of the blower (4) branches in the middle, one is connected to the burner through the damper (72K), and the other is connected through the damper to the primary combustion air inlet (8K). ).In addition, the outlet side piping of the spray tower (5) is connected to the tertiary combustion air inlet (9) of the burner via the blower (g).
It is connected to. The other configurations are the same as in the first embodiment.

そして、送風機(4)による熱交換器(1)からの昇温
燃焼空気は、バーナー(んの1次燃焼空気入口(7)及
び2次燃焼空気入口(8)へと導かれる。また、送風機
(イ)はスプレー塔(5)よりの蒸気含有空気を3次燃
焼空気入口(9)に導く。
Then, the heated combustion air from the heat exchanger (1) by the blower (4) is guided to the primary combustion air inlet (7) and the secondary combustion air inlet (8) of the burner. (A) directs steam-containing air from the spray tower (5) to the tertiary combustion air inlet (9).

この第3実施例では、バーナー(6)への昇温燃焼空気
または蒸気含有空気の送入圧等の変化に対応し易すくし
である。そのため制御が簡単にできるといった利点があ
る。尚、バーナー(6)の燃焼状態は第1実施例の場合
と同様である。
This third embodiment is a comb that can easily respond to changes in the pressure of the heated combustion air or steam-containing air fed to the burner (6). Therefore, it has the advantage of being easy to control. Incidentally, the combustion state of the burner (6) is the same as in the first embodiment.

実施側番 第μ図は本発明に係る第ダ実施例を示し、送風機(4)
の吐出側の配管は、バーナー(6)の1次燃焼空気入口
(7)に接続しである。また送風機(至)の吐出側の配
管は途中で分岐され、一方はダンパーを介し2次燃焼空
気入口(8)に、他方はダンパーを介して3次燃焼空気
入口(9)に接続しである。他の構成は第3実施例と同
様である。
Embodiment No. μ shows a second embodiment of the present invention, in which a blower (4)
The discharge side piping is connected to the primary combustion air inlet (7) of the burner (6). In addition, the piping on the discharge side of the blower (to) is branched in the middle, and one side is connected to the secondary combustion air inlet (8) through a damper, and the other side is connected to the tertiary combustion air inlet (9) through a damper. . The other configurations are the same as in the third embodiment.

そして、送風機(4)により、熱交換器(1)からの昇
温燃焼空気をバーナー(6)の1次燃焼空気入口(7)
へと導く。また送風機(1)はスプレー塔(5)により
蒸気含有空気を一次燃焼空気入口(8)及び3次燃焼空
気入口(9)に導くようにしである。この実施例も上記
第3実施例と同様の利点を有する。尚、バーナーの燃焼
状態は第2実施例と同様である。
The blower (4) then directs the heated combustion air from the heat exchanger (1) to the primary combustion air inlet (7) of the burner (6).
lead to. The blower (1) is also adapted to direct steam-containing air to the primary combustion air inlet (8) and the tertiary combustion air inlet (9) by means of a spray tower (5). This embodiment also has the same advantages as the third embodiment. Incidentally, the combustion state of the burner is the same as in the second embodiment.

(本発明の効果) 以上、叙述のように本発明は、排ガスによる熱交換によ
って昇温された燃焼空気を使用することにより、バーナ
ーの消費燃料の節減を図ることができると共に、バーナ
ー燃焼において、昇温燃焼空気と共に蒸気含有空気を用
いて燃焼させることにより、燃焼温度の上昇を蒸気の気
化熱によって降下させることができ、且つ低酸素燃焼と
蒸気含有空気中の窒素含有量の少なざとによってNOx
の発生を極力抑えることができる。
(Effects of the present invention) As described above, the present invention makes it possible to reduce the fuel consumption of the burner by using combustion air whose temperature has been raised by heat exchange with exhaust gas, and also to reduce fuel consumption in the burner combustion. By performing combustion using steam-containing air together with heated combustion air, the increase in combustion temperature can be lowered by the heat of vaporization of the steam, and NOx can be reduced due to low-oxygen combustion and low nitrogen content in the steam-containing air.
The occurrence of can be suppressed as much as possible.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係る第1実施例の説明図、第2図は第
2実施例の説明図、第3図は第3実施例の説明図、第弘
図は第1実施例の説明図である。 (υ・・・熱交換器、(5)・・・スプレー塔、(7)
 (8) (9)・・・燃焼空気入口、(ト)・・・バ
ーナー。 4  l ハ シベ 2 ハ パ j 小 シペ 48
Fig. 1 is an explanatory diagram of the first embodiment according to the present invention, Fig. 2 is an explanatory diagram of the second embodiment, Fig. 3 is an explanatory diagram of the third embodiment, and Fig. 3 is an explanatory diagram of the first embodiment. It is a diagram. (υ...heat exchanger, (5)...spray tower, (7)
(8) (9)... Combustion air inlet, (g)... Burner. 4 l Hashibe 2 Hapa j Kosipe 48

Claims (2)

【特許請求の範囲】[Claims] (1)熱交換器を介して排ガスにより、供給される燃焼
空気を昇温し、この昇温燃焼空気の流れを二分割にして
、一方に分割した昇温燃焼空気を、バーナーの3ケ所に
設けた燃焼空気入口の少なくとも1ケ所に導くようにし
、他方に分割した昇温燃焼空気に水を噴霧して蒸気含有
空気とし、この蒸気含有空気を上記バーナーの3ケ所に
設けた燃焼空気入口の内、上記昇温燃焼空気を導いた燃
焼空気入口以外の他の燃焼空気入口に導くようにしたバ
ーナーの低NOx燃焼方法。
(1) The temperature of the combustion air supplied by exhaust gas is increased through a heat exchanger, the flow of this heated combustion air is divided into two, and the divided heated combustion air is sent to three locations on the burner. At least one of the combustion air inlets provided in the burner is provided, and water is sprayed on the heated combustion air that is divided into the other to produce steam-containing air, and this vapor-containing air is introduced into the combustion air inlets provided at three locations in the burner. Among them, a low NOx combustion method using a burner in which the heated combustion air is guided to another combustion air inlet other than the combustion air inlet to which the above-mentioned heated combustion air was introduced.
(2)上記分割した一方の昇温燃焼空気を、水スプレー
塔内を通過させることによつて蒸気含有空気とするよう
にした特許請求の範囲第1項記載のバーナーの低NOx
燃焼方法。
(2) A low NOx burner according to claim 1, wherein one of the divided heated combustion air is made into steam-containing air by passing through a water spray tower.
Combustion method.
JP4980585A 1985-03-13 1985-03-13 Method of burner combustion with low nox Pending JPS61208410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4980585A JPS61208410A (en) 1985-03-13 1985-03-13 Method of burner combustion with low nox

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4980585A JPS61208410A (en) 1985-03-13 1985-03-13 Method of burner combustion with low nox

Publications (1)

Publication Number Publication Date
JPS61208410A true JPS61208410A (en) 1986-09-16

Family

ID=12841355

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4980585A Pending JPS61208410A (en) 1985-03-13 1985-03-13 Method of burner combustion with low nox

Country Status (1)

Country Link
JP (1) JPS61208410A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012521530A (en) * 2009-03-26 2012-09-13 エルダッバグ,ファディ Equipment for reducing emissions and improving energy efficiency in fossil and biofuel combustion systems

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS593108B2 (en) * 1979-10-13 1984-01-23 松下電工株式会社 charger

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS593108B2 (en) * 1979-10-13 1984-01-23 松下電工株式会社 charger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012521530A (en) * 2009-03-26 2012-09-13 エルダッバグ,ファディ Equipment for reducing emissions and improving energy efficiency in fossil and biofuel combustion systems

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